|Sensors and Systems Journal, No. 9, September 2004 (Contents and Abstracts)|
Afonin S. M. The circuits of nano- and microdisplacement piezoengines for precision electromechanical systems
The paper examines application features and circuits of nano- and microdisplacement piezoengines for precision electromechanical systems. The deformation of piezoengine’s piezoelectric actuating element conformed to its stressed state is considered.
Andreev V. G., Pal’chik O. G. Measurement accuracy improvement of moving object’s geometrical parameters by a laser triangulation method
The problem of measurement accuracy improvement for geometrical parameters of train wheels in motion is solved. Different methods for finding the location of laser triangulator’s echo pulse centre are compared. The advantages of the barycentric method with adaptive threshold processing are shown; the realizability problems are discussed.
Mikhailov P. G. The methods for strain control in sensing elements and systems of microelectronic sensors
The principles of strain level control in microelectronic sensors’ elements and structures are discussed. Design techniques for internal strains minimization are offered.
Degtyarev S. V., Panishchev V. S. Objects contours pick on image out with Sobel and Laplas operators base on neural network
The problem of object’s edge detection on image is considered. The paper suggests to use a neural network for edge detection with the help of Sobel and Laplace operators. The neural network structure used for solving the problem is offered.
Stuchebnikov V. M. On temperature error normalization for tensoresistive semiconductor sensors
The normalization of additional temperature error with the help of linear temperature coefficient may cause considerable distortion of measurement results for tensoresistive mechanical sensors operating in wide temperature range. The paper shows that the normalization of temperature error band within the operating temperature range where the compensation of the additional temperature error is carried out is more adequate. This is especially important for tensoresistive semiconductor sensors with nonlinear temperature dependence of the output signal.
Vasiliev A. A. Semiconductor sensors for fluorine, anhydrous hydrogen fluoride and fluorocarbons detection
The sensitivity of silicon- and silicon carbide-based MIS structures with lanthanum trifluoride undergate layer to various fluorine-containing gases is studied in the temperature range 20…530°C. Silicon-based sensors can be used for fluorine and anhydrous hydrogen fluoride detection under room temperature. At this temperature the fluorine sensitivity is 28.0±0.5 mV/lg(p(F2)) while the anhydrous hydrogen fluoride sensitivity is 44.4±1.6 mV/lg(p(HF)), and the detection threshold is about 10 ppb. Silicon carbide-based high-temperature sensors can be applied for fluorine and fluorocarbons (such as CF3CH2F, CF3CCl3, CF3CH2Cl, CHClF2, CCl2F2, and CCl3F) concentration measurement at temperatures up to 530°C. The relationship between sensor signal and fluorocarbons concentration is Nernst-type, the detection threshold is ca. 10 ppm.
Lyubimov V. V. Magnetometers for electromagnetic environmental monitoring and research
The paper considers several new magnetometer models that allow measuring constant and variable magnetic fields, carry out their spectrum analysis, study their spatial characteristics and conduct electromagnetic monitoring of environment. The new instruments include MF-01M, MF-03G, MH-06M handheld magnetometers of MAGIC Series, and IDL-04M and IDL-07M intellectual magnetometers of IMPEDANCE Series based on fluxgate and Hall-type magnetic field sensors. The instruments are intended for both field and lab applications; they are reliable, easy-to-work and low-cost.
Kiriakov V. Kh., Lyubimov V. V. Hypogeomagnetic fields and the Hypomag instrument
The paper describes the effects and features of hypo- and hypergeomagnetic fields and briefly informs about a new magnetometric instrument Hypomag created in IZMIRAN. The instrument can be used for electromagnetic monitoring of apartments and electromagnetic level measurements in local and hypomagnetic lodgments.
Lipanov A. M., Gulyaev P. V., Shelkovnikov E. Yu. A precision nanodisplacement piezoengine for a scanning tunnel microscope
The paper reveals the cause of error in the positioning of the sample and the sensing needle of a tunnel microscope and determines the ways to reduce it. It examines the transients in a mass-inertial piezoelectric engine and describes a stepper piezoengine with friction force compensation in the kinematic pair.
Makarov V. V., Volodin S. M. The multichannel measurements of frequency pulse signals by modified dependent counting method
The multichannel broad-band measurements of frequency pulse signals by dependent counting method are investigated. The measurement accuracy and speed estimates are obtained.
Sushko B. C. A meter for static electricity charge in approach flow
Sensitive devices for measuring the volumetric charge of static electricity in moving flows of high-resistance liquid (light petroleum) or aerosols are designed and created. The device’s sensor includes two rectangular wings, one of which oscillates in the approach flow. The wings carry a system of reception electrodes, from where the electrical signal proportional to the liquid’s static electricity charge is picked up. The devices’ block diagrams are presented; the design features of their transducers are described.
Red’ko V. V., Red’ko L. A. High-voltage tester of cable insulation
A high-voltage analyzer of cable insulation is described. The insulation material can be polyethylene, PVC, or rubber. The tester is intended for detecting, recording and counting of cable insulation defects in process of EI-2 voltage tests with 50 Hz sine-wave voltage according to GOST-2990 Russian National Standard. The tester meets RD 1614.640-88 requirements and ensures test voltage crest within 1.5…15 kV under cable’s insulance more than 6 MΩ and capacity less than 200 pF. The maximum velocity of cable’s motion is 200 m per minute. The tester provides audible and light indication of insulation failure and a link with external automation facilities.
Kargapol’tsev V. P. The requirements to spilling units for water and process flowmeters
The paper formulates basic requirements to spilling units for water and process flowmeters calibration and illustrates them with a case study of a service spilling unit developed and manufactured by Hydrodynamica Experimental Design Office (Kirov, Russia).
Kornev E. A., Lelyukhin A. S. Effective quantum efficiency of X-ray detector’s registration with a complementary radiation converter
The design of an X-ray detector with a complementary radiation converter is described. A functional detector model is offered, and the relationships for effective quantum efficiency of detector’s registration as function of quantums’ energy and input stream’s rate are obtained.
Vasilieva N.P., Kasatkin S.I. New development trends in integrated magnetoresistive elements
The paper reviews new trends in the integrated magnetoresistive elements development caused by the advances of submicron technologies and the results of fundamental investigations of magnetic phenomena. It presents the research and development data on integrated logical components based magnetoresistive memory cells, application of new amorphous magnetic materials and the technologies for improving the parameters of other magnetic elements.
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